12-24.
When computing plant-mix
materials, you use what pound
value to represent the approximate
weight of 1 cubic foot of
compacted hot-mix asphalt?
1.
80 pounds
2.
100 pounds
3.
120 pounds
4.
146 pounds
12-25.
When you are performing asphalt
hand spreading operations, what
problem can result if you throw
the material a long distance or
dump it from too great a height?
1.
The hot-mix will cool too fast
2.
The hot-mix will splatter all
over the place
3.
The hot-mix will segregate
4.
The hot-mix will fail to bind
with the mix placed on the
ground
12-26.
What is the most important phase
of flexible pavement construction?
1.
Compaction
2.
Mixing
3.
Paving
4.
Transporting
12-27.
What is an advantage of mixed-in–
place construction?
1.
It takes less time and
skill to work with
2.
It retains a higher road-
bearing ratio
3.
The aggregate is already
on the roadbed or available
from nearby source
4.
The asphalt is less expensive
and can be laid in cold
weather
12-28.
A single layer of road-mix
pavement normally has what
thickness, in inches?
1.
1/2 to 1
2.
1
to 1 1/2
3.
1 1/2 to 3
4.
3 1/2 to 4 1/2
12–29.
“Surface moisture” is defined as
1.
the depth of puddling water
2.
the film of water around each
particle of stone or sand
3.
the estimated number of
gallons of water a road
surface can hold
4.
the amount of moisture that
collects on a road surface
during early morning hours
12–30.
A uniform mix controls the rate
of travel and mixing operation
of a travel mix plant.
1.
True
2.
False
12-31.
When performing blade–mixing
operations, you should apply what
total number of equal applications
of bitumen with a bituminous
distributor?
1.
Two
2.
Three
3.
Four
4.
Five
12–32.
The bituminous mix should be
spread when the surface is damp
or when the mix itself contains
an excessive amount of moisture.
1.
True
2.
False
Learning Objective:
Recognize
the defects and techniques of
repairing flexible pavements.
12–33.
Which of the following types
of surface cracks is caused by
excessive movement of the surface
over unstable subgrades or base
courses?
1.
Alligator
2.
Edge
3.
Reflection
4.
Slippage
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